Finding the Fourth Proportional to 86,439, 129,680.38 and 24,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,439 : 129,680.38 = 24,109.50 : x
2. Step 2: Convert to fraction form
   86,439/129,680.38 = 24,109.50/x
3. Step 3: Cross multiply
   86,439x = 129,680.38 × 24,109.50
4. Step 4: Simplify right side
   86,439x = 3,126,529,121.61
5. Step 5: Solve for x
   x = 3,126,529,121.61/86,439
6. Step 6: Final answer
   x = 36,170.35